A novel driving scheme that enables displaying motion-pictures on LCDs is proposed, and a prototype LCD has successfully been demonstrated with a fast response LC cell. In this driving scheme, scanning black stripes are inserted in displayed images so that impulsive emission like that of CRTs can be produced. It is found that the LCD has a markedly improved motion-image quality compared with conventional LCDs.

The photochemical reactions of different N-(2-acylphenyl)-2-bromo-2-methylpropanamides have been investigated. Irradiation of the N-unsubstituted anilides 1a ± 1c gave the corresponding dehydrobromination, cyclization, and bromo-migration products 2, 3, and 4, respectively ( Table 1). Irradiation of the N-alkyl anilides 1e ± 1g afforded the corresponding deacylation and cyclization products 5 and 6, respectively, whereas irradiation of the N-alkyl anilides 1i ± 1k, carrying 2-benzoyl groups on the aromatic rings, afforded the unexpected tricyclic lactams 7 (besides 2, 5, and 6). The formation of the cyclization products 6 could be rationalized in terms of an electrocyclic ring closure of the 6p-electron-conjugated enamides 2 produced by dehydrobromination of 1, followed by thermal 1,5-acyl migration (Path B in the Scheme). The formation of the bridged lactams 7 probably follows a mechanism involving the 1,7-diradical 8 generated by z-H-abstraction (1,8-H transfer) by an excited acyl O-atom (Path A).

We have performed a novel motion picture simulation that can reproduce the perception of moving images on a screen of hold‐type displays as still images. It can be used to evaluate motion picture quality quantitatively and to help improve the quality through optimization of the values of relevant parameters in hold‐type displays like liquid crystal displays.

A system-on-glass (SOG) DRAM intended for integrated framememories of 262k-color QCIF+ displays has been developed. An integrated codec circuit reduces the number of memory cells and layout area by a factor of 2/3. By combining the SOG-DRAM, which has a data retention time of over 16.6 ms, with an embedded controller that enables simultaneous access for writing and reading, a frame-memory has been created. The operation was verified by chip measurement and demonstration.

We propose a tiny compression and decompression codec, Smart Pixel‐data Codec (SPC), for display pixel data. This codec can greatly reduce frame memories with a constant data compression rate and, therefore can reduce chip area of display driver ICs. Since random accessibility to the frame memory is kept for the SPC circuit, it is very suitable for the circuit implementation on display driver ICs. Comparable image quality with original images has practically been achieved even for the compression rate of 72%.